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| Management of soil water based on agriculture sustainable development in Hilly Latored soil area of South Subtropics in Guangdong |
| GUO Qing-Rong, ZHONG Ji-Hong, WAN Hong-Fu, TAN Jun |
| Guangdong Institute of Eco-environmental and Soil Sciences, Guangzhou 510650, China |
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Abstract Because of very thick weathered layer, intensive penetrability and loose structure, abundance of heat and water resources of Hilly Latored Soil Area of South Subtropics in Guangdong may provide an advantage for farming . Two problems related to the soil water for the sustainable development of agriculture in this area, including the very low water infiltration in the wet seasons, resulting in water and soil erosion, and the drought condition in the dry seasons from October to February of next year for the crops with shallow roots. The seasonal fluctuation of water condition is one of the main reasons for the seasonal drought of soil and some shallow-rooted crops. The soil water storage capacity and the available water content are very low, combined with low unsaturated hydraulic conductivity and hydraulic diffusivity. Some biological or engineering techniques and measurements of regulating and managing soil moisture are proposed to improve soil moisture and prevent or decrease soil evaporation for agriculture sustainable development.
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Received: 25 February 2003
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